铁硒基高温超导磁通和杂质束缚态的高分辨STM研究

马约拉纳零能模服从非阿贝尔统计，对实现拓扑量子计算具有重要的应用价值，是当前凝聚态领域的研究前沿之一。铁硒基超导(Li1-xFex)OHFeSe体系的磁通中心发现了鲁棒的马约拉纳零能模及其量子化电导平台。该体系超导能隙大，零能与非零磁通束缚态能量间隔大而易于区分，是研究零能模的理想研究平台。因此，本项目基于该体系提出，利用高能量分辨STM技术，通过研究磁通束缚态中零能模在空间分布上的自旋极化特性，以及研究磁通间相互作用或杂质态对零能模的影响，更多地揭示马约拉纳零能模的物理特性，并利用自旋极化STM技术直接探测杂质的磁性特征，预期获取该体系中超导配对对称性的重要信息。

Majorana Zero Mode(MZM) obeys the Non-Abelian statistics, so it provides potential application in quantum computing， and it becomes a hot spot in the condensed matter area. In the vortex core of FeSe-based superconductors (Li1-xFex)OHFeSe, robust MZM and its quantized conductance plateau has been discovered. (Li1-xFex)OHFeSe has large superconducting gaps, and the energy spacing is large between zero mode and non-zero mode, which makes it an ideal platform for zero mode study. Thus, this project proposes to use the high-resolution STM, to explore the spin-polarized property of MZM on spatial distribution, and to study the how the interaction of vortices or the impurity states influence the zero mode, in order to reveal more special physical properties of MZM. Furthermore, this project will try to use spin-polarized STM to study the magnetic property of impurity directly, aiming to obtain important information of superconducting pairing symmetry of (Li1-xFex)OHFeSe.